'use strict'
const path = require('path')
const defaultSettings = require('./src/settings.js')

function resolve(dir) {
  return path.join(__dirname, dir)
}

const name = defaultSettings.title || 'vue Admin Template' // page title

// If your port is set to 80,
// use administrator privileges to execute the command line.
// For example, Mac: sudo npm run
// You can change the port by the following methods:
// port = 9528 npm run dev OR npm run dev --port = 9528
const port = process.env.port || process.env.npm_config_port || 9528 // dev port

// All configuration item explanations can be find in https://cli.vuejs.org/config/
module.exports = {
  /**
   * You will need to set publicPath if you plan to deploy your site under a sub path,
   * for example GitHub Pages. If you plan to deploy your site to https://foo.github.io/bar/,
   * then publicPath should be set to "/bar/".
   * In most cases please use '/' !!!
   * Detail: https://cli.vuejs.org/config/#publicpath
   */
  // 对于静态资源的访问,publicPath是配置相对路径的. 假设域名是: www.bufanui.com
  // 比如 index.css  =>   http://www.bufanui.com/static/css/index.css
  // 但是有些情况下,后台可能会修改静态资源的路径,必须访问 http://www.bufanui.com/abc/static/css/index.css 才能正确的访问到资源
  // 那么需要配置publicPath: '/abc/',此时: index.css  =>    http://www.bufanui.com/abc/static/css/index.css
  publicPath: '/leju-shop-2103/',
  outputDir: 'dist',
  assetsDir: 'static',
  lintOnSave: process.env.NODE_ENV === 'development',
  productionSourceMap: false,
  devServer: {
    port: port, // 端口
    open: true, // 浏览器默认启动打开
    overlay: {
      warnings: false,
      errors: true
    },
    // 开发阶段可以通过配置代理突破跨域.
    // 打包结束 webpack配置整个都不存在了,包括代理部分!
    // 问? 打包结束后,还有跨域吗?
    // 什么时候会跨域?  协议(http) 域名  端口 任意一个不同就是跨域
    // 解决跨域的几种形式:
    // 1. 开发阶段使用 proxy代理实现
    // 2. 后台可以直接配置cors(后台处理)
    // 3. 可以通过nginx配置做转发实现(后台配置)
    // 注意: 代理和 request.js中的axios.baseURL 不是共存的!!!
    // baseURL什么时候用???前台独立部署的时候用!!
    proxy: {
      // 以/lejuAdmin开始的所有请求,被代理到target的目标地址.
      '^/(lejuAdmin|abc)': {
        target: defaultSettings.serveHost, // 服务器
        changeOrigin: true, // 跨域必须配置
        // 先空着,就像眼镜,你需要的时候,自然会想到它
        // 比如需求: 接口: /maodan/order/list ===> 发送: /goudan/order/list
        pathRewrite: {
          // 'maodan': 'goudan'
        }
      }
      // '^/api': {
      //   target: 'xxxx', // 服务器
      //   changeOrigin: true, // 跨域必须配置
      //   pathRewrite: { // 先空着
      //   }
      // }
    },
    // 注意: before会阻止我们的请求,导致错误,所以改成after. 实际开发这个mock是不需要的
    after: require('./mock/mock-server.js') // mock模拟
  },
  configureWebpack: {
    // provide the app's title in webpack's name field, so that
    // it can be accessed in index.html to inject the correct title.
    name: name,
    resolve: {
      alias: {
        '@': resolve('src')
      }
    }
  },
  chainWebpack(config) {
    // it can improve the speed of the first screen, it is recommended to turn on preload
    config.plugin('preload').tap(() => [
      {
        rel: 'preload',
        // to ignore runtime.js
        // https://github.com/vuejs/vue-cli/blob/dev/packages/@vue/cli-service/lib/config/app.js#L171
        fileBlacklist: [/\.map$/, /hot-update\.js$/, /runtime\..*\.js$/],
        include: 'initial'
      }
    ])

    // when there are many pages, it will cause too many meaningless requests
    config.plugins.delete('prefetch')

    // set svg-sprite-loader
    config.module
      .rule('svg')
      .exclude.add(resolve('src/icons'))
      .end()
    config.module
      .rule('icons')
      .test(/\.svg$/)
      .include.add(resolve('src/icons'))
      .end()
      .use('svg-sprite-loader')
      .loader('svg-sprite-loader')
      .options({
        symbolId: 'icon-[name]'
      })
      .end()

    config
      .when(process.env.NODE_ENV !== 'development',
        config => {
          config
            .plugin('ScriptExtHtmlWebpackPlugin')
            .after('html')
            .use('script-ext-html-webpack-plugin', [{
            // `runtime` must same as runtimeChunk name. default is `runtime`
              inline: /runtime\..*\.js$/
            }])
            .end()
          config
            .optimization.splitChunks({
              chunks: 'all',
              cacheGroups: {
                libs: {
                  name: 'chunk-libs',
                  test: /[\\/]node_modules[\\/]/,
                  priority: 10,
                  chunks: 'initial' // only package third parties that are initially dependent
                },
                elementUI: {
                  name: 'chunk-elementUI', // split elementUI into a single package
                  priority: 20, // the weight needs to be larger than libs and app or it will be packaged into libs or app
                  test: /[\\/]node_modules[\\/]_?element-ui(.*)/ // in order to adapt to cnpm
                },
                commons: {
                  name: 'chunk-commons',
                  test: resolve('src/components'), // can customize your rules
                  minChunks: 3, //  minimum common number
                  priority: 5,
                  reuseExistingChunk: true
                }
              }
            })
          // https:// webpack.js.org/configuration/optimization/#optimizationruntimechunk
          config.optimization.runtimeChunk('single')
        }
      )
  }
}
